NDUBISI, N. O; MADU, C. N. CUSTOMER RETENTION STRATEGIES IN THE TELECOMMUNICATIONS INDUSTRY: THE SIGNIFICANCE OF RELATIONSHIP MARKETING. Global Research Journal of Management and Social Sciences (GRJMSS), [S. l.], v. 14, n. 2, p. 25–35, 2023. Disponível em: https://zapjournals.com/Journals/index.php/grjmss/article/view/524. Acesso em: 22 jun. 2025.